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Tecnología para detectar el nivel de dióxido de carbono (CO2) disuelto en un líquido almacenado en un contenedor sellado y en líneas de transferencia presurizadas


Oferta Tecnológica
Un centro de investigación irlandés, que está especializado en investigación básica y aplicada en fotónica para aplicaciones en áreas tan diversas como telecomunicaciones, dispositivos médicos, alimentación y fabricación de productos farmacéuticos, ha desarrollado y obtenido la patente de un sistema óptico y un método para calcular el nivel de dióxido de carbono (CO2) disuelto en un líquido almacenado en un contenedor sellado o transferido mediante una línea presurizada. El sistema de medida se basa en espectroscopía infrarroja media y mide el nivel de CO2 disuelto en un líquido carbonatado independientemente de su composición. El centro de investigación busca socios con el fin de establecer acuerdos de comercialización con asistencia técnica, licencia, investigación y cooperación técnica.


Technology to determine the level of Carbon Dioxide (CO2) dissolved in liquid within a sealed container and in pressurized transfer lines.
An Irish Research Centre has developed a patented invention which provides an optical system and method for calculating the level of Carbon Dioxide (CO2) dissolved in a liquid stored in a sealed container or being transferred though a pressurized line. They are seeking suitable partners for commercial agreements with technical assistance, license agreement, research cooperation agreement -Y- technical cooperation agreement.
Carbon dioxide (chemical formula CO2) is a colourless and odourless gas. It is a versatile material used, to mention a few, in industry, for example, as an inert gas in welding and fire extinguishers, and oil recovery, as a chemical feedstock and in liquid form as a solvent in decaffeination of coffee and supercritical drying. It is added to drinking water and carbonated beverages including beer and sparkling wine to add effervescence.

An Irish Research Centre conducting both applied and fundamental research on photonics for applications in areas as diverse as telecommunications, medical devices, food and pharmaceutical manufacturing has developed a patented technology which provides an optical system and method for calculating the level of CO2 dissolved in a liquid stored in a sealed container or being transferred though a pressurized line.
The technology is an optical measurement system, based on the principle of mid- infrared spectroscopy, to directly measure the level of dissolved CO2 in a carbonated liquid, regardless of its composition.

The most commonly used absorption is found at 4.26-Y-micro;m (2349 cm-1) and for example, this is the wavelength is typically used to measure gas phase CO2 in the atmosphere using transmission spectroscopy.

However, the aim of this system is to measure high partial pressures (1-4 bar) within a closed volume. In this scenario, with the level of CO2 present in the light path, the absorption at 4.26-Y-micro;m is so strong that it will not allow light to reach the detection system and hence render it useless.

As a result another CO2 absorption line must be used and in one example 2.004-Y-micro;m (4990 cm-1) can be chosen. Although there are other more suitable absorption lines (e.g. 2.779-Y-micro;m) it is the availability of light sources and technology at 2-Y-micro;m that makes it the best candidate for the operating wavelength.

Additionally the absorption line at 2-Y-micro;m is very narrow in comparison to some of the other lines so it lends itself easily to making a comparison measurement of on and off resonance which is how the measurement is achieved.

To ensure the fidelity of this measurement these on and off resonance wavelengths must ideally be close together with a similar transparency through container walls such that any difference in absorption will not unduly affect the measurement.
To realise this on and off resonance arrangement an optical filter can be deployed to tune the wavelength of an LED which will be seen by the detector. This can be done a number of ways and not exhaustive, such as for one example, utilising two separate optical filters with different passbands which correspond to the two measurement wavelengths.

In this way rotation of the filter allows the system to scan across the wavelength range of interest to make the comparison between on and off resonance.

The light is detected using a detector which has response in the 2-Y-micro;m range, i.e. an extended InGaAs (indium gallium arsenide) photodiode. The photodetector is also temperature stabilised in order to ensure the same linear response for different external temperatures and thereby reduce the level of thermal noise.
There is a system software which uses both the calculated partial pressure and the estimated liquid temperature to calculate the level of dissolved CO2 in units of CO2 [L] / Liquid [L].

The Research Centre is seeking suitable partners for commercial agreements with technical assistance to imbed the technology, license agreement associated with sector specific, research cooperation agreement to exploit other areas of use -Y- technical cooperation agreement to valorise the technology further.

These partnership opportunities which are available from the Centre are dependent on Expressions of Interest (EOI´s) outcomes and can be negotiated on a standalone case or combined.
Advantages and Innovations:
The system can inspect CO2 partial pressure of closed containers in a non-destructive manner, (provided the container walls are optically transparent to a defined set of wavelengths corresponding to CO2 absorption band).

The technology utilizes a tuneable narrow-band filter and a broad-band light-emitting diode (LED) for high selectivity of the absorption wavelength of CO2.

The measurement is irrespective of the liquid under test as well as the presence of different gasses in the container or line.

The components that comprise the system are cheap and processing is straightforward.
Stage of Development:
Prototype available for demonstration
Patents granted
CommeR Statunts Regarding IPR Status:
Patent is granted in Ireland

Partner sought

Type and Role of Partner Sought:
Depending on an EOI discussion outcome - the possibilities can be with an R-Y-D partner with an agreement to further interrogate -Y- exploit the advantages of the technology.

Commercialisation partner with strategic sector experience with industry that can focus on delivering the technology as an opportunity including technical assistance.

As an opportunity for an SME or large industry in their sector utilising a license.


Type and Size of Client:
R&D Institution
Already Engaged in Trans-National Cooperation:
Languages Spoken:


Technology Keywords:
02009018 Dispositivos de medida
09001009 Tecnología de sensores relacionada con la realización de medidas
09001007 Tecnología óptica relacionada con la realización de medidas
05003002 Óptica